added Gravitational - How to SSH Properly

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Philippe Lagadec 2020-05-07 23:32:10 +02:00 committed by GitHub
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@ -189,6 +189,7 @@ See also [Active Directory](#active-directory) and [ADFS](#adfs) below.
- [Positron Security SSH Hardening Guides](https://www.sshaudit.com/hardening_guides.html) (2017-2018) - focused on crypto algorithms
- [stribika - Secure Secure Shell](https://stribika.github.io/2015/01/04/secure-secure-shell.html) (2015) - some algorithm recommendations might be slightly outdated
- [Applied Crypto Hardening: bettercrypto.org](https://bettercrypto.org/) - handy reference on how to configure the most common services crypto settings (TLS/SSL, PGP, SSH and other cryptographic tools)
- [Gravitational - How to SSH Properly](https://gravitational.com/blog/how-to-ssh-properly) - how to configure SSH to use certificates and two-factor authentication
### TLS/SSL